igneous concentration
41Lake — /layk/, n. Simon, 1866 1945, U.S. engineer and naval architect. * * * I Relatively large body of slow moving or standing water that occupies an inland basin. Lakes are most abundant in high northern latitudes and in mountain regions, particularly …
42Volcano — This article is about the geological feature. For other uses, see Volcano (disambiguation) …
43Yosemite National Park — Infobox Protected area name = Yosemite National Park iucn category = Ib caption = locator x = 20 locator y = 84 location = Tuolumne, Mariposa, Madera Counties, California, USA nearest city = Mariposa lat degrees = 37 lat minutes = 50 lat seconds …
44Pentlandite — Infobox mineral name = Pentlandite boxwidth = caption = formula = iron nickel sulfide:(Fe,Ni)9S8 color = Yellowish bronze habit = Hexoctahedral rare; massive to granular system = Isometric cleavage = absent octahedral parting fracture =… …
45The Ozarks — Ozark redirects here. For other uses, see Ozark (disambiguation). Ozark Mountain redirects here. For the wine region, see Ozark Mountain AVA. The Ozarks, Ouachitas, Black Hills, and Sawtooths …
461812 New Madrid earthquake — The Great Earthquake at New Madrid. A nineteenth century woodcut from Devens Our First Century (1877) …
47New Madrid Seismic Zone — Coordinates: 36°34′57″N 89°35′17″W / 36.58245°N 89.58801°W / 36.58245; 89.58801 …
48Geography and climate of Singapore — The geography of Singapore is marked by a small, heavily urbanised, island city state in Southeast Asia, located at southern tip of the Malayan Peninsula between Malaysia and Indonesia. Singapore has a total land area of 699 km² and 193 km of… …
49Wichita Mountains — Range Elk Mountain, in the eastern Wichita Mountains …
50Samarium-neodymium dating — is useful for determining the age relationships of rocks and meteorites, based on decay of a long lived Sm isotope to a radiogenic Nd isotope. Nd isotope ratios are used to provide information on the source of igneous melts as well as to provide… …
